,申请号RO19690060911-传众专利搜索

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发明名称
摘要
申请公布号	RO56174(A2)	申请公布日期	1974.04.29
申请号	RO19690060911	申请日期	1969.08.29
申请人		发明人
分类号	E21B23/00;(IPC1-7):E21B23/00	主分类号	E21B23/00
代理机构		代理人
主权项
地址

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